Improvement in wheels and pulleys



` WILL!M'D..GRMSHAW.

Improvement in Wheelsand Pulleys.

No. 122,456. Paehted'xamz, 1872.

Nrrnn strnfrns ieaf'rnNr @Nerea wiLLIAM DAxlN CnrMsHAw, or ANs'oNIA,CONNECTICUT;

IiVHVROVEilENTV IN WHEELS AND PULLEVS.

Specification forming part of Leiters Patent No. 122,456, dated January'2, 1872.

ing part of this specification, and in which- Figure l represents aninner face view of a railroad car-wheel constructed in accordance withmy improvement, and Fig. 2 a transverse section ofthe same as'` fittedto its axle. Fig. 3 shows av transverse section of a pulley (in part)similarly constructed. Fig. et is a sectional view, on a larger scale,of the outer portion of the wheel represented in Figs. l and 2. ySimilar letters of reference indicate corresponding parts throughout theseveral figures of the drawing.

My invention consists in a novel construction of wheels and pulleys byforming them or their bodies and rims in two main parts out of y elasticsheet-metal plates, struck up in suitable dies or otherwise made to formdish-shaped elastic disks, the one smaller than the other,

and so that on arranging them with their hollow sides face to face, thesmaller dish-shaped disk, which constitutes the one side ofthe wheel orpulley, is caused, by a hanged construction of it, to restconcentrically lwithin and against the other or larger disk that isconstructed to constitute both the" opposite side or face of the wheelor pulley and tread or rhn thereof; also, in case of a railroadcar orother like wheel, the flange thereof. And in this connection theinvention further consists in such a constructionml ofthe dish-shapeddisks as that the smaller disk is made selfcentering within the largerone by causing its iiange to rest upon a beveled or curved surfaceformed within the larger one. Wheels or pulleys constructed according tothis invention may be made cheap and combine lightness with strength,and when made of steel possess a large and almost universal'elasticity.

Referring in the iirst instance to Figs. l, 2, and 4c of theaccompanying drawing, A represeuts the one side or face, B the rim ortread, and G the iiange of a railroad car-wheel, all

i formed in one piece out of a sheet or plate of steel cut and pressedor struck up in a Vdie to form a hollow or dish-shaped steel disk of theshape shown in the drawing, and which may 4be done by means of a machineor press coustructed and operating substantially as described .iuLetters Patent of the United States issued to me December 1,1868. D is asmaller hollow or dish-shaped steel disk, struck up or y formed in asimilar manner, and made with a flange, a, which, when said disk isiitted to its 1place within the larger disk, rests upon or against abeveled or curved surface, b, formed at the junction of the side yA withthe rim B of the larger disk. This bearing of the smaller disk (whichconstitutes the other side ofthe car-wheel on the largerone serves tosecure a concentric arrangement of the former disk within the latter.Between these dish-shaped elastic disks, at their center, may bearranged a castiron or other suitable hub, E, formed'with shoulders forthe disks to rest against and projectin g at its reduced ends throughthe disks. The hub and elastic disks thus arranged may be securedtogether by bolts c, and the whole fitted to the axle F in any suitablemanner. A railroad car-wheel, the body, tread, and iiange of which areall made up of but two pieces of sheet-metal disks of dish-shaped form,arranged'one within the other, as represented and described, combinesnot only lightness with strength and cheapness of construction, butsecures an elasticity to it in various directions-as, for instance, indirection ofthe axis of the wheel, transversely thereto, and in atwisting direction crosswise of the axle. rlhis universal elasticityrelieves the axle of strain on the wheel passing over irregularities inthe rail-surface, and more especially as occurring at the joints of therail sections and secures an easy Vrunning action generally to the car.By the bearing of the flan ge t of the smaller disk on the bevel bformed in the larger one the smaller disk readily returns or adjustsitself to its concentric arrangement within the larger one on anydisplacement of it therefrom by the tipping or skewing of the axle. Forcarriage and other wheels 1n which no outer iiange C is required thesame is omitted in shaping or stamping the larger disk. Fig. representsa sheet-metal pulley, constructed substantially as described, of twohollow or dish-shaped elastic disks,`which are arranged one Within theother, and made the one to support the other, as hereinbetore specifiedWith reference to the car-Wheels shown in Figs. l and 2.

It is an essential feature in this invention,

'in order to secure an independent elasticity to 2. The hollowsheet-metal elastic disk l),

formed with a ange, a, in combination with the reversely-arranged largerelastic disk of similar character, but constructed to form both the 011eside of the body and 'rim or tread of the Wheel or pulley, and formedwith a beveling or curved seat, b, for the liange a of the smallery diskto bear against in the tit of the one disk Within the other, essentiallyas specilied.

3. A Wheel or pulley composed of steel plate or other elastic sheetmetal, the parts of which, though mutually sustaining, are boundtogether only at or near the hub or center, and allowed to preserve,independently of each other, their natural elasticity in other parts,substantially as herein described.

W. D. GRIMSHAW.

- Witnesses:

FRED. HAYNES,

HENRY PALMER. (79)

